PM78630: SYSTEM TASK CRST MAY ABEND AKEC IN DFHRSTP.

A fix is available

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APAR status

  • Closed as program error.

Error description

  • Abend AKEC may occur in CICS system task CRST in program
    DFHRSTP.  CICS will attempt to issue message DFHRS0004.  Since
    message DFHRS0004 is not defined, CICS will issue message
    DFHME0108 instead.  The text of the message will be similar to
    the following:
    
      DFHME0108 Message DFHRS0004 cannot be found in module DFHMET1E
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All.                                         *
    ****************************************************************
    * PROBLEM DESCRIPTION: Abend AKEC may occur in CICS system     *
    *                      task CRST in program DFHRSTP.  CICS     *
    *                      will attempt to issue message           *
    *                      DFHRS0004.  Since message DFHRS0004 is  *
    *                      not defined, CICS will issue message    *
    *                      DFHME0108 instead.  The text of the     *
    *                      message will be similar to the          *
    *                      following:                              *
    *                                                              *
    *                        DFHME0108 Message DFHRS0004 cannot be *
    *                                  found in module DFHMET1E    *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The region status (RS) domain long running task, CRST, is posted
    to update the RS block for a region, when a short-on-storage
    (SOS) condition occurs, or if a SOS, TRANDUMP or SYSDUMP
    condition ends.  Program DFHRSTP, which runs as the processor
    for CRST under the QR TCB, has a loop that is entered and
    processed until the RS block is updated.
    
    The flag that is currently used to enter and maintain the loop
    for SOS start, is also used by other RS domain programs to
    indicate that the RS block needs to be updated.  If another task
    running under the QR TCB is currently processing an update
    request, but is suspended for file I/O to the coupling facility,
    then if DFHRSTP gets control with the flag on, it will not be
    able to turn off the flag because of the update being performed
    by the suspended task.  Instead it will loop under the QR TCB
    until the ICVR value expires, at which point an abend AKEC will
    occur.
    
    When a RS domain program encounters an AKEC abend, CICS will
    attempt to issue message DFHRS0004.  Since message DFHRS0004 is
    not defined, CICS instead will issue message DFHME0108.
    

Problem conclusion

  • A new flag, SOS_HAS_STARTED, has been defined in the RS domain
    anchor block.  DFHRSTP has been updated to use the new flag to
    enter and control processing of its loop.  Module DFHRSSM, which
    posts DFHRSTP to wake up when a SOS condition starts, has been
    updated to turn on the new flag before posting DFHRSTP for the
    SOS condition start.  No other RS domain programs use this new
    flag.
    
    Module DFHMERSE, has been updated to define message DFHRS0004.
    The CICS Transaction Server for z/OS Version 5 Release 1 CICS
    Messages and Codes Vol 2, GC34286200, has been updated with
    the new message.
    

Temporary fix

  •             *********
                * HIPER *
                *********
    FIX AVAILABLE BY PTF ONLY
    

Comments

APAR Information

  • APAR number

    PM78630

  • Reported component name

    CICS TS Z/OS V5

  • Reported component ID

    5655Y0400

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-12-06

  • Closed date

    2013-03-11

  • Last modified date

    2013-04-02

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

    UK92415

Modules/Macros

  •    DFHMERSC DFHMERSE DFHMERSK DFHRSSM  DFHRSTP
    

Publications Referenced
GC34286200        

Fix information

  • Fixed component name

    CICS TS Z/OS V5

  • Fixed component ID

    5655Y0400

Applicable component levels

  • R800 PSY UK92415

       UP13/03/22 P F303

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.



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Document information


More support for:

z/OS family

Software version:

5.1

Reference #:

PM78630

Modified date:

2013-04-02

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